<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>董胜烨 第二次作业</title>
</head>
<body>
<pre>import math

pos = [0, 0]
while True:
    s = input()
    if not s:
        break
    if s == "STOP":
        break
    movement = s.split(" ")
    direction = movement[0]
    steps = int(movement[1])
    if direction == "UP":
        pos[0] += steps
    elif direction == "DOWN":
        pos[0] -= steps
    elif direction == "LEFT":
        pos[1] -= steps
    elif direction == "RIGHT":
        pos[1] += steps
    else:
        pass

print(int(round(math.sqrt(pos[1] ** 2 + pos[0] ** 2))))
    </pre>
</body>
</html>